diff --git a/types/office-js-preview/index.d.ts b/types/office-js-preview/index.d.ts
index 3c7ca449fe..ae469c62ad 100644
--- a/types/office-js-preview/index.d.ts
+++ b/types/office-js-preview/index.d.ts
@@ -12061,6 +12061,9 @@ declare namespace Office {
     /**
      * The item namespace is used to access the currently selected message, meeting request, or appointment. 
      * You can determine the type of the item by using the `itemType` property.
+     * 
+     * To see the full member list, refer to the
+     * {@link https://docs.microsoft.com/office/dev/add-ins/reference/objectmodel/preview-requirement-set/office.context.mailbox.item | Object Model} page.
      *
      * If you want to see IntelliSense for only a specific type or mode, cast this item to one of the following:
      *
diff --git a/types/office-js/index.d.ts b/types/office-js/index.d.ts
index b879db5ec9..389516d74d 100644
--- a/types/office-js/index.d.ts
+++ b/types/office-js/index.d.ts
@@ -11875,6 +11875,9 @@ declare namespace Office {
      * The item namespace is used to access the currently selected message, meeting request, or appointment. 
      * You can determine the type of the item by using the `itemType` property.
      *
+     * To see the full member list, refer to the
+     * {@link https://docs.microsoft.com/office/dev/add-ins/reference/objectmodel/preview-requirement-set/office.context.mailbox.item | Object Model} page.
+     *
      * If you want to see IntelliSense for only a specific type or mode, cast this item to one of the following:
      *
      * - {@link Office.AppointmentCompose | AppointmentCompose}